Improvement in machine foe tenoning blind-slats



@nitrati` Patent ffice.

JOHN J. CLARK AND THOMAS CLARK, 0F ELGlN,- 1LLlNOllS. Lena-8 Parent No. 66,678, ma .my 16, i867.

IMPROVEMENT'IN MAGEINB FOR TBNONNG BLIND-SLATS.

TO ALL WHOM AIT MY CONCERN:

' Beit known that we, JonN J; CLARK and THOMAS CLAnn, of Elgin, in the county'of Kane, and State of Illinois, have invented a new and useful Improvement in Machinery for Tenon'fing Slats for Window-Blinds; and we do hereby declare the following is a full and exact description thereof', reference being had to th-e accompanying drawings, and to the letters of reference marked thereon making-a part of this specification, in which- Figure 1 is a side elevation of the machine.

Figure 2 is a vertical transverse section of the same on line n: at, with fig. 3 detached.

Figure 3 is a detached section on lines e andf.

Similar letters of reference where they occur in Vthe separate figures denote like parts in each of the drawings. v

Our invention relates to an improvement in that class of machineswherein two series of circular saws are employed, of which there are four saws in each series, and so arranged that two of said saws cut the Slat to a proper length, as two cut the shoulder at opposite ends, and the remaining four form the tenen, by revolving or turning the Islat while in contact with the saws'. i

The nature of our improvement consists rst, in a device for holding and rotating the slat; and, second, in the device for removing the slet from 4the machine when complete. i

To enable others skilled'in the art to construct and use our invention we will proceed to describe the same with reference to the drawings. v

M represen-ts the frame of the machine, and C the line or driving-shaft, which is provided with wheels T that receive b'elts ZZ which pass upward and around pulleys t' i on horizontal shafts, E E, which is held in braces or frames S S that are attached to the main frame, and so arranged as to be capable of beiug'moved in the direction of the length to any graduated distance c ne from the other. At the inner ends of said shafts E E are attached saws, four in number, saws e e being greater in diameter than saws ff, and the centre saws t t between said saws; and attached to the centre of the main frameis a second frame, D, which is capable of being adjusted vertically by means of screw z and hinge o', said frame D being provided at its centre with a gear-wheel, W, which gears with a second wheel, W, which is also held within said frame. Said wheel W has its sides turnedor cut away to form a. bearing upon which it revolves, and its centre having a hollow space therein extending through the same longitudinally, and suiiicient in size transversely to receive the slut, which is held therein by means of a spring, H, that is attached to inner side of said wheel W, which has a slot, d, cut from the centre or space therein, outward through the rim, which when revolved to the proper angle agrees with a' corresponding sldt, d, in the side of frame D through which the blind-slut passes. There is also attached to the side of frame D a circular or arch-shaped piece of metal, p, which is provided with circular slots or grooves through which pass screws or bolts upon which said larch moves, the same having a. part protruding from its centre towards the centre, of wheel W, which comes in contact with or against a pin, z', extending outward from the end of the bearing of said wheel, which admits of said arch moving on the screws or bolts to a distance suiiicient to bring the slot in the wheel to agree with the slot in -the frame as th'e motion of the wheel is reciprocated. Upon the shaft of wheel W are attached pulleys i' r which receive straps n n, the same passing or eirtending downward through the centre of the main frame; strap n being attached to treadle m, and strap n being provided with or attached to aweight, m". To the main frame, between the saws and frame' D, are circular pieces of metal, 'A A, extending upward beyond the centre of frame D, and are provided at their centre with a. revolving cylinder, B, which has also a slot, d, cut therein, which, when Suid cylinder is revolved, agrees with a like slot, d, in the sides of the circular pieces A A; the object of this arrangement being to hold the end of the slat rm against the saw. There is alsoattached to the upper part of frame D an adjustable slide, R, which is provided with adjustable arms a: ze which extend backward and downward below the centre of wheel W,:1s shown in iig., 2.

The operation of our machine is as follows: The slut to be tenoned is'plueed within slots dd of wheel W and cylinders A A, which bring the end of the slat in contact with the saws, and as wheels T T of' shaft C are rotated which communicate with pulleys z'z'of shaft E E by means of belts Z Z, .the saws are subjected to a high rotary motion. Treadle m is then forced downward, which communicates with pulley r of wheel W by means of-strap nrsaid wheel Wl gearing with wheel W, causing the same to revolve once around. Thus sa-ws e e eut the slat to a proper length, sawsff cut the shoulders, and saws t t form the teuon. Treadle m is allowed to rise by means of weight m which communicates with pulley 9' of wheel W. Thus said wheel is rotated back, which gears with wheel W, turning the same back until slot d of said wheel agrees with slot d of'- frame D. Slide R is then drawn forward, which comes in contact with the slat, forcing the same out'through the slots in the Wheel and frame by means of arms z sv. We have said that wheels W W are attached to or Within frame D; or they may be attached to one or both of the cylinders B of the circular piecesP A AA', which will produce substantially the same result. i

Having thus described the nature and object of our invention, we disclaim the combination of wheels TT, shaft',` C, belts l Z, pulleys z't', shafts E E, saws e e,ff, t t, and cylinder B of circular pieces A A, or any part thereof broadly considered. 1

But what we do claim as new, and desire to secure by Letters Patent, is-

1. Wheels W and W,f when used in combination with arch-piece P, constructed and operating substantially as and for the purpose described'. v i i 2. Springs H H, when used for holding slat in slot d, subtantially as described.

3. The combination of slide R and adjustable arms x m, for the purpose substantially us set forth.

` JOHN J. CLARK,

THOMAS CLARK.

Witnesses:

A. BAM, N. H. SHERBURNE. 

